[circt] Bump to ed1847092 — fix bytecode fast-path external constant init

- Updates CIRCT_REF_LOCKED to ed1847092a7ef898e81dc58c68b4018d2c7c6957
  (fixes case/mux bug: bytecode fast-path registers were zero-initialized
  on each activation, so module-scope constants were never materialized)
- Fixes sync-circt-wasm.sh VPI patch: Emscripten 4.0.21 no longer emits
  `await` before the wasmTable.get() call; make it optional in the regex
- Re-uploaded static/circt artifacts to the circt-wasm GitHub release

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: thomasahle

scripts/sync-circt-wasm.sh

@@ -220,8 +220,8 @@ replaceExact(
 // VPIRuntime::registerCb requires non-null cb_rtn; we pass a placeholder (1).
 // The JS yield hook handles all dispatch; the table call is a formality.
 replaceExact(
-  /if\(cbFuncPtr\)return await wasmTable\.get\(cbFuncPtr\)\(cbDataPtr\);return 0/,
-  'if(cbFuncPtr){try{return await wasmTable.get(cbFuncPtr)(cbDataPtr);}catch(e){}}return 0',
+  /if\(cbFuncPtr\)return (?:await )?wasmTable\.get\(cbFuncPtr\)\(cbDataPtr\);return 0/,
+  'if(cbFuncPtr){try{return wasmTable.get(cbFuncPtr)(cbDataPtr);}catch(e){}}return 0',
   'vpi yield try-catch'
 );
 

scripts/toolchain.lock.sh

@@ -7,7 +7,7 @@ readonly NODE_MAJOR_VERSION_LOCKED="22"
 readonly EMSDK_VERSION_LOCKED="4.0.21"
 
 readonly CIRCT_REPO_LOCKED="https://github.com/thomasnormal/circt.git"
-readonly CIRCT_REF_LOCKED="6f649f63b8be09c8dbb5cd5b9bd56e1ef0e1d9b1"
+readonly CIRCT_REF_LOCKED="ed1847092a7ef898e81dc58c68b4018d2c7c6957"
 readonly CIRCT_LLVM_SUBMODULE_REF_LOCKED="aa3d6b37c7945bfb4c261dd994689de2a2de25bf"
 
 readonly SURFER_ARTIFACT_URL_LOCKED="https://gitlab.com/surfer-project/surfer/-/jobs/artifacts/main/download?job=pages_build"